Assessing Disclosure Risk and Data Utility Trade-off in Transaction Data Anonymization
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    Abstract:

    Organizations and businesses, including financial institutions and healthcare providers, are increasingly collecting and disseminating information about individuals in the form of transactions. A transaction associates an individual with a set of items, each representing a potentially confidential activity, such as the purchase of a stock or the diagnosis of a disease. Thus, transaction data need to be shared in a way that preserves individuals' privacy, while remaining useful in intended tasks. While algorithms for anonymizing transaction data have been developed, the issue of how to achieve a "desired" balance between disclosure risk and data utility has not been investigated. In this paper, we assess the balance offered by popular algorithms using the R-U confidentiality map. Our analysis and experiments shed light on how the joint impact on disclosure risk and data utility can be examined, which allows the production of high-quality anonymization solutions.

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Grigorios Loukides, Aris Gkoulalas-Divanis, Jianhua Shao. Assessing Disclosure Risk and Data Utility Trade-off in Transaction Data Anonymization. International Journal of Software and Informatics, 2012,6(3):399~417

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